[ARM] S3C: Merge next-s3c64xx-dma2 into for-rmk-devel

Merge branch 'next-s3c64xx-dma2' into for-rmk-devel

Conflicts:

	arch/arm/plat-s3c64xx/Makefile

5 files changed, 246 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index 1403915..935c755 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -159,6 +159,13 @@ config S3C_GPIO_CFG_S3C64XX
 	  Internal configuration to enable S3C64XX style GPIO configuration
 	  functions.
 
+# DMA
+
+config S3C_DMA
+	bool
+	help
+	  Internal configuration for S3C DMA core
+
 # device definitions to compile in
 
 config S3C_DEV_HSMMC
diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile
index 061e204..6106514 100644
--- a/arch/arm/plat-s3c/Makefile
+++ b/arch/arm/plat-s3c/Makefile
@@ -18,6 +18,10 @@ obj-y				+= pwm-clock.o
 obj-y				+= gpio.o
 obj-y				+= gpio-config.o
 
+# DMA support
+
+obj-$(CONFIG_S3C_DMA)		+= dma.o
+
 # PM support
 
 obj-$(CONFIG_PM)		+= pm.o
diff --git a/arch/arm/plat-s3c/dma.c b/arch/arm/plat-s3c/dma.c
new file mode 100644
index 0000000..c9db75c
--- /dev/null
+++ b/arch/arm/plat-s3c/dma.c
@@ -0,0 +1,86 @@
+/* linux/arch/arm/plat-s3c/dma.c
+ *
+ * Copyright (c) 2003-2005,2006,2009 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C DMA core
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+struct s3c2410_dma_buf;
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+
+#include <mach/dma.h>
+#include <mach/irqs.h>
+
+#include <plat/dma-plat.h>
+
+/* dma channel state information */
+struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS];
+struct s3c2410_dma_chan *s3c_dma_chan_map[DMACH_MAX];
+
+/* s3c_dma_lookup_channel
+ *
+ * change the dma channel number given into a real dma channel id
+*/
+
+struct s3c2410_dma_chan *s3c_dma_lookup_channel(unsigned int channel)
+{
+	if (channel & DMACH_LOW_LEVEL)
+		return &s3c2410_chans[channel & ~DMACH_LOW_LEVEL];
+	else
+		return s3c_dma_chan_map[channel];
+}
+
+/* do we need to protect the settings of the fields from
+ * irq?
+*/
+
+int s3c2410_dma_set_opfn(unsigned int channel, s3c2410_dma_opfn_t rtn)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	pr_debug("%s: chan=%p, op rtn=%p\n", __func__, chan, rtn);
+
+	chan->op_fn = rtn;
+
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_set_opfn);
+
+int s3c2410_dma_set_buffdone_fn(unsigned int channel, s3c2410_dma_cbfn_t rtn)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	pr_debug("%s: chan=%p, callback rtn=%p\n", __func__, chan, rtn);
+
+	chan->callback_fn = rtn;
+
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn);
+
+int s3c2410_dma_setflags(unsigned int channel, unsigned int flags)
+{
+	struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
+
+	if (chan == NULL)
+		return -EINVAL;
+
+	chan->flags = flags;
+	return 0;
+}
+EXPORT_SYMBOL(s3c2410_dma_setflags);
diff --git a/arch/arm/plat-s3c/include/plat/dma-core.h b/arch/arm/plat-s3c/include/plat/dma-core.h
new file mode 100644
index 0000000..32ff2a9
--- /dev/null
+++ b/arch/arm/plat-s3c/include/plat/dma-core.h
@@ -0,0 +1,22 @@
+/* arch/arm/plat-s3c/include/plat/dma.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * Samsung S3C DMA core support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+extern struct s3c2410_dma_chan *s3c_dma_lookup_channel(unsigned int channel);
+
+extern struct s3c2410_dma_chan *s3c_dma_chan_map[];
+
+/* the currently allocated channel information */
+extern struct s3c2410_dma_chan s3c2410_chans[];
+
+
diff --git a/arch/arm/plat-s3c/include/plat/dma.h b/arch/arm/plat-s3c/include/plat/dma.h
new file mode 100644
index 0000000..34dba98
--- /dev/null
+++ b/arch/arm/plat-s3c/include/plat/dma.h
@@ -0,0 +1,127 @@
+/* arch/arm/plat-s3c/include/plat/dma.h
+ *
+ * Copyright (C) 2003,2004,2006 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * Samsung S3C DMA support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+enum s3c2410_dma_buffresult {
+	S3C2410_RES_OK,
+	S3C2410_RES_ERR,
+	S3C2410_RES_ABORT
+};
+
+enum s3c2410_dmasrc {
+	S3C2410_DMASRC_HW,		/* source is memory */
+	S3C2410_DMASRC_MEM		/* source is hardware */
+};
+
+/* enum s3c2410_chan_op
+ *
+ * operation codes passed to the DMA code by the user, and also used
+ * to inform the current channel owner of any changes to the system state
+*/
+
+enum s3c2410_chan_op {
+	S3C2410_DMAOP_START,
+	S3C2410_DMAOP_STOP,
+	S3C2410_DMAOP_PAUSE,
+	S3C2410_DMAOP_RESUME,
+	S3C2410_DMAOP_FLUSH,
+	S3C2410_DMAOP_TIMEOUT,		/* internal signal to handler */
+	S3C2410_DMAOP_STARTED,		/* indicate channel started */
+};
+
+struct s3c2410_dma_client {
+	char                *name;
+};
+
+struct s3c2410_dma_chan;
+
+/* s3c2410_dma_cbfn_t
+ *
+ * buffer callback routine type
+*/
+
+typedef void (*s3c2410_dma_cbfn_t)(struct s3c2410_dma_chan *,
+				   void *buf, int size,
+				   enum s3c2410_dma_buffresult result);
+
+typedef int  (*s3c2410_dma_opfn_t)(struct s3c2410_dma_chan *,
+				   enum s3c2410_chan_op );
+
+
+
+/* s3c2410_dma_request
+ *
+ * request a dma channel exclusivley
+*/
+
+extern int s3c2410_dma_request(unsigned int channel,
+			       struct s3c2410_dma_client *, void *dev);
+
+
+/* s3c2410_dma_ctrl
+ *
+ * change the state of the dma channel
+*/
+
+extern int s3c2410_dma_ctrl(unsigned int channel, enum s3c2410_chan_op op);
+
+/* s3c2410_dma_setflags
+ *
+ * set the channel's flags to a given state
+*/
+
+extern int s3c2410_dma_setflags(unsigned int channel,
+				unsigned int flags);
+
+/* s3c2410_dma_free
+ *
+ * free the dma channel (will also abort any outstanding operations)
+*/
+
+extern int s3c2410_dma_free(unsigned int channel, struct s3c2410_dma_client *);
+
+/* s3c2410_dma_enqueue
+ *
+ * place the given buffer onto the queue of operations for the channel.
+ * The buffer must be allocated from dma coherent memory, or the Dcache/WB
+ * drained before the buffer is given to the DMA system.
+*/
+
+extern int s3c2410_dma_enqueue(unsigned int channel, void *id,
+			       dma_addr_t data, int size);
+
+/* s3c2410_dma_config
+ *
+ * configure the dma channel
+*/
+
+extern int s3c2410_dma_config(unsigned int channel, int xferunit);
+
+/* s3c2410_dma_devconfig
+ *
+ * configure the device we're talking to
+*/
+
+extern int s3c2410_dma_devconfig(int channel, enum s3c2410_dmasrc source,
+				 unsigned long devaddr);
+
+/* s3c2410_dma_getposition
+ *
+ * get the position that the dma transfer is currently at
+*/
+
+extern int s3c2410_dma_getposition(unsigned int channel,
+				   dma_addr_t *src, dma_addr_t *dest);
+
+extern int s3c2410_dma_set_opfn(unsigned int, s3c2410_dma_opfn_t rtn);
+extern int s3c2410_dma_set_buffdone_fn(unsigned int, s3c2410_dma_cbfn_t rtn);
+
+